Ok , changed my mind AGAIN . I am now thinking about the Borla S Catback system in my 2SS/M6 Stock all around . Question is if I get the S system can I add the ATAK mufflers later if I want it louder ? Also am thinking Halltech for intake .

Sure you can fit any cat back you want but I highly suggest you make your mind up and save the hassle of buying again later. I have the S type as the ATAK wasnt out and it sounds awesome and isnt too loud but I would love to have the ATAK as I dont even use the radio and just listen to the beautiful rumble of power and the smell of race gas.

Ok , changed my mind AGAIN . I am now thinking about the Borla S Catback system in my 2SS/M6 Stock all around . Question is if I get the S system can I add the ATAK mufflers later if I want it louder ? Also am thinking Halltech for intake .

You can do that if you want. Just get the Type S catback now and add ATAK axel back mufflers later if you want to change the sound...but it will cost you an extra $600 at a minimum and if you're already thinking of switching to ATAK why wouldn't you just get those?